A blanking die for sheet metal parts with high-precision shaft holes

Abstract

The invention discloses a blanking die for a sheet part with a high-precision axle hole. The blanking die comprises an upper male die body, a discharging plate and a lower female die, wherein the discharging plate is in elastic fit with the upper male die body; the blanking die is mainly characterized in that a compacting plate used for compacting a to-be-machined workpiece is arranged on a working surface of the discharging plate. Under the working conditions of being compacted in a surface-surface manner by the compacting plate and the lower female die and being positioned by a positioning core rod, the to-be-machined workpiece with the axle hole is punched and blanked to be formed. The blanking die has the characteristics that the technical scheme is reasonable, the structure is simple, the precision of the axle hole and the precision of the position of the axle hole are high, the punching and blanking forming precision is high, and the like; the blanking die is particularly applicable to punching forming production of laminated stators of motors.

Description

technical field [0001] The invention relates to a blanking die for sheet metal parts with high-precision shaft holes (or through holes), in particular to a blanking and punching metal die for sheet metal parts, which belongs to the technology of forming dies for sheet metal parts. Background technique [0002] The shaft holes in the present invention are all the through holes on the sheet material which are precisely matched with the shaft holes of other workpieces. [0003] The blanking punching of the sheet metal workpiece with shaft holes in the prior art usually adopts the blanking die head connected with the upper die to implement the punching process. Under its working condition, the processed sheet metal workpiece existing between the unloading plate and the micro-gap working surface of the lower die is generally in a non-compacted free state, and the processed sheet metal workpiece is formed on it At the moment of punching by the blanking die, the "strip structure" ...

AI Technical Summary

Problems solved by technology

This defect cannot be overcome by the subsequent grinding process, so that there are inconsistencies in the fit gap between the lamination rotor of the motor and the local shaft hole of the lamination stator and the misalignment of the shaft hole, which directly affects the quality of the motor.

[0006] And similar negative effects caused by poor fitting accuracy of the shaft hole and misalignment of the shaft hole also exist in the production of other industrial products.

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